CN101309103A - Congestion management suitable for wideband satellite communication system - Google Patents
Congestion management suitable for wideband satellite communication system Download PDFInfo
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- CN101309103A CN101309103A CNA2008100554064A CN200810055406A CN101309103A CN 101309103 A CN101309103 A CN 101309103A CN A2008100554064 A CNA2008100554064 A CN A2008100554064A CN 200810055406 A CN200810055406 A CN 200810055406A CN 101309103 A CN101309103 A CN 101309103A
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- 238000013468 resource allocation Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000006727 cell loss Effects 0.000 claims description 3
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- 238000013461 design Methods 0.000 abstract description 12
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Abstract
The invention discloses a congestion management method suitable for a broadband satellite communication system, which relates to the congestion management technology of the broadband satellite communication system in telecommunication field. The invention provides the proposal design of the system congestion management function and provides a configuration requirement on the buffer capacity of the satellite equipment from the aspects of satellite-ground congestion management function distribution, bandwidth resource distribution type, priority level design and congestion control measures based on the application and technology characters of broadband satellite communication system. The invention mainly uses pre-arranged bandwidth resource plan and distribution, adopts satellite equipment configured with large buffer to simplify the congestion control measures between satellite equipment and ground equipment, and effectively solves the design conflict between the quality of service of the system and the utilizing ratio of the bandwidth resource. The congestion management method suitable for a broadband satellite communication system of the invention has the advantages of simplifying the complexity of satellite equipment, enhancing the system running stability, and increasing the quality of service and the bandwidth resource utilizing ratio of the system. The congestion management method suitable for a broadband satellite communication system of the invention is especially suitable for the node-interconnected broadband satellite communication system.
Description
Technical field
The present invention relates to a kind of congestion management that is applicable to wideband satellite communication system in the communications field, be specially adapted to towards the congestion management of the wideband satellite communication system of node interconnection.
Background technology
For wideband satellite communication system, because transmission rate is higher, propagation delay time is bigger, system must possess corresponding congestion management feature to guarantee the qos requirement of reliable and stable operation of network and guarantee customer service.Though in general requirement, congestion management feature based on the cocommutative wideband satellite communication system of star is identical with ground system, but owing to be subjected to the influence of factors such as spaceborne environment, propagation delay time, effective congestion management measure and be not suitable for wideband satellite communication system in ground system, therefore solve the congestion management problem of whole system effectively, especially the congestion management problem between the star ground has a very important role to raising system business service quality (QoS), bandwidth resources utilance.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of application and technical characterstic at wideband satellite communication system, by adopting a series of technical measures and the means of aspects such as star ground congestion management feature distribution, bandwidth resource allocation, priority design, satellite borne equipment configuration large capacity cache, realize the congestion management of wideband satellite communication system.The present invention has the satellite borne equipment of simplification complexity, enhanced system operation stability, improves characteristics such as system business service quality (QoS) and bandwidth resources utilance.
Technical problem to be solved by this invention is realized by following technical scheme:
The system congestion administrative skill that the present invention is made up of the congestion management feature of spaceborne ATM switch, ICBM SHF satellite terminal, network management control center three parts:
The congestion management of described spaceborne ATM switch comprises step:
1. monitor the cell-queue's length in each output port buffer memory of spaceborne ATM switch in real time;
2. broadcast in real time the cell-queue's length in each output port buffer memory of spaceborne ATM switch earthward;
3. take place when congested when spaceborne ATM switch, according to cell priority and abandon sign and carry out the cell discard processing, obtain the service quality of high-priority service;
4. according to the wideband satellite communication system seating surface to node or towards the occupation mode of broadband user's transfer of data, the multi-access mode of uplink downlink and memory capacity, the processing speed of spaceborne ATM switch, spaceborne ATM switch can be carried out the dynamic assignment of I/O bandwidth resources by user's service bandwidth demand;
The congestion management of described ICBM SHF satellite terminal comprises step:
5. ICBM SHF satellite terminal is carried out the flow control of access service according to the bandwidth of being distributed;
6. take place will the cell of CLP=1 to be abandoned when congested when ICBM SHF satellite terminal, simultaneously congestion information is sent to the network management control center and carry out congested processing, CLP is a Cell Loss Priority in the formula;
7. ICBM SHF satellite terminal receives the cell-queue's length in the output buffers of spaceborne ATM switch broadcasting, this information is sent to the network management control center monitor processing;
8. ICBM SHF satellite terminal monitoring access service flow, the foundation that these service traffics are carried out bandwidth resource allocation and adjustment as network management control center, spaceborne ATM switch;
The congestion management at described network management control center comprises step:
9. the bandwidth resources of distributing, adjusting the satellite communication system network are concentrated at the network management control center;
10. in real time the bandwidth resources of monitor satellite communication system network are used, and when according to the priority that connects, the bandwidth of distribution, removing selectively and causing congested connection when congested appears in the satellite communication system network, remove congestion state;
Finish the congestion management of wideband satellite communication system.
The present invention the is the cell-queue's length in each the output port buffer memory of spaceborne ATM switch described in the step 1., its buffer memory capacity is not less than 5000 cells, wherein the buffer memory capacity that independently takies of each output port is not less than 100 cells, and remaining buffer memory capacity can adopt each output port to share and take or independent occupancy mode.
2. the present invention the broadcasts cell-queue's length in each output port buffer memory of spaceborne ATM switch in real time described in the step earthward, and its broadcast rate should be not less than 9.6kbps.
The present invention the is the cell priority described in the step 3., and its priority is no less than 8 grades.
The present invention the is the bandwidth resources described in the step 9., and its bandwidth resources are distributed by VP/VC and adjusted, and VP is a virtual path in the formula, and VC is a virtual channel.
The present invention the 10. satellite communication system network described in the step occurs congestedly, and its criterion is that cell-queue's length in any output port buffer memory of spaceborne ATM switch is greater than 1000 cells.
The present invention compares with background technology has following advantage:
1. the design of network management control of the present invention center (NOCC) congestion management feature, it is at the application of wideband satellite communication system and technical characterstic, with the anticipatory bandwidth MRP be assigned as the master, and carry out system congestion according to the network congestion situation in conjunction with the service priority design and control, to improve system business service quality (QoS) and bandwidth resources utilance.
2. the design of spaceborne ATM switch congestion management feature of the present invention, it is to have taken into full account parts selection and environmental limit on the star, and the mode of adopt satellite borne equipment configuration large capacity cache, monitoring and broadcast each buffer to ports situation is in real time simplified the congested control measure between the star ground equipment and the design complexities of satellite borne equipment.
3. the design of ICBM SHF satellite terminal congestion management feature of the present invention, it is a disposal ability of utilizing ground installation, finishes most of congestion management feature of system, as the flow control and the jam control function of access service.
4. the present invention has the satellite borne equipment of simplification complexity, enhanced system operation stability, improves characteristics such as system business service quality (QoS) and bandwidth resources utilance.
Description of drawings
Fig. 1 is the composition schematic diagram of the congestion management feature of spaceborne ATM switch of the present invention, ICBM SHF satellite terminal, network management control center (NOCC) three parts.Among Fig. 1: 1 is that spaceborne ATM switch, 2-1,2-2 are that ICBM SHF satellite terminal, 3 is network management control center (NOCC).
Embodiment
With reference to Fig. 1, the wideband satellite communication system congestion management scheme that the present invention is made up of the congestion management feature of spaceborne ATM switch 1, ICBM SHF satellite terminal 2-1,2-2, network management control center 3 three parts.
For wideband satellite communication system, because transmission rate is higher, propagation delay time is bigger, system must possess corresponding congestion management feature to guarantee the qos requirement of reliable and stable operation of network and guarantee customer service.Advise according to ITU-T, the congestion management feature of the wide-band communication system on ground can be divided into two levels: ground floor is precautionary measures, be called flow control, be for preventing that congested a series of measures of taking from appearring in network, comprising traffic shaping, Bandwidth Management, operation parameter control (UPC) and priority control etc.; The second layer is reactive measure, is called congested control, is to occur will reducing to congested intensity, coverage, duration minimum after congested and a series of measures of taking when network, abandons or congested indication etc. as the cell selectivity.Though in general requirement, congestion management feature based on the cocommutative wideband satellite communication system of star is identical with ground system, but owing to be subjected to the influence of factors such as spaceborne environment, propagation delay time, effective congestion management measure and be not suitable for wideband satellite communication system in ground system, the present invention is directed to the wideband satellite communication system characteristics, its congestion management measure need be designed and optimize targetedly, proposed to be applicable to the congestion management scheme of wideband satellite communication system.
The design of embodiment the solution of the present invention constitutes and technical characterstic at the system of wideband satellite communication system, the congestion management feature of system is divided into three parts to be realized, as shown in Figure 1, Fig. 1 is the composition schematic diagram of the congestion management feature of spaceborne ATM switch 1 of the present invention, ICBM SHF satellite terminal 2, network management control center (NOCC) 3 three parts.
The congestion management of described spaceborne ATM switch comprises step:
1. monitor the cell-queue's length in spaceborne ATM switch 1 each output port buffer memory in real time.
Spaceborne ATM switch 1 each the output port buffer memory capacity of the present invention is not less than 5000 cells, and wherein the buffer memory capacity that independently takies of each output port is not less than 100 cells, and remaining buffer memory capacity can adopt each output port to share and take or independent occupancy mode.Embodiment the mode that 1. spaceborne ATM switch 1 each output port buffer memory adopts buffer to ports to share in the step reduces the satellite borne equipment hardware size.Independently take but need to guarantee to adopt when each output port buffer memory minimum capacity is not less than 100 cells, the buffer memory minimum capacity that embodiment independently takies adopts 150 cells.System is under non-congestion state, and the certain output buffers capacity (a hundreds of cell) of spaceborne ATM switch 1 output port configuration just can reach higher system bandwidth availability ratio (more than 90%); Under congestion state, the bigger buffer memory of spaceborne ATM switch output port configuration then helps ground and takes congested control measure, just removes the congestion state of equipment before the output buffers formation is overflowed, thereby guarantees QoS.The buffer memory capacity of embodiment equipment disposition is 6000 cells.
2. broadcast in real time the cell-queue's length in spaceborne ATM switch 1 each output port buffer memory earthward.The present invention broadcasts its speed in real time earthward should be not less than 9.6kbps.Embodiment the 2. in the step spaceborne ATM switch 1 can adopt the mode of special cell to broadcast in real time by Traffic Channel, press 30 cells calculating of per second broadcasting, 53 bytes of each cell, payload 48 bytes (384bit), then broadcast rate is 11.52bps.
3. take place when congested when spaceborne ATM switch 1, according to cell priority and abandon sign and carry out the cell discard processing, obtain the service quality of high-priority service.Cell priority of the present invention is no less than 8 grades.3. embodiment the requires customer service should indicate the grade of service that need obtain when the access band satellite communication system in the step, so that system is to its differentiated treatment.For the requirement of different business QoS, the priority of its cell transmission is different, and wherein high priority is used for the transmission of speech, video, management information, and low priority is generally used for the data service transmission.According to priority design and user's applicable cases of present ground network, whole wideband satellite communication system need be supported 8 grades of priority, and to guarantee the qos requirement of different business, therefore spaceborne ATM switch, ICBM SHF satellite terminal need be supported 8 grades cell processed.
4. according to the wideband satellite communication system seating surface to node or towards the occupation mode of broadband user's transfer of data, the multi-access mode of uplink downlink and memory capacity, the processing speed of spaceborne ATM switch, spaceborne ATM switch can be carried out the dynamic assignment of I/O bandwidth resources by user's service bandwidth demand.Among the embodiment, system is to support the internodal interconnect services of ground network, the up-downgoing multi-access mode adopts the FDMA mode, and the software of spaceborne ATM switch do not possess the signaling process function, and then spaceborne ATM switch does not possess the function of dynamic assignment as required of bandwidth resources.
The congestion management of described ICBM SHF satellite terminal comprises step:
5. ICBM SHF satellite terminal 2 is carried out the flow control of access service according to the bandwidth of being distributed.When embodiment surpassed the bandwidth of being distributed when the service traffics mean value that inserts, ICBM SHF satellite terminal can limit flow.
6. when ICBM SHF satellite terminal 2 generations are congested, will the cell of CLP=1 be abandoned, simultaneously congestion information is sent to the network management control center and carry out congested processing, CLP is a Cell Loss Priority in the formula.Embodiment the 6. in the step CLP=1 be the cell of low priority, when congested, can preferentially abandon.
7. the cell-queue's length in the output buffers of spaceborne ATM switch 1 broadcasting of ICBM SHF satellite terminal 2 receptions sends to the network management control center with this information and monitors processing.Among the embodiment, the network management control center configuration is in a certain ICBM SHF satellite terminal side, and the cell-queue's length in the spaceborne ATM switch output buffers that will be received by this ICBM SHF satellite terminal directly sends to the network management control center by the internal proprietary agreement.
8. ICBM SHF satellite terminal 2 is monitored access service flows, the foundation that these service traffics are carried out bandwidth resource allocation and adjustment as network management control center, spaceborne ATM switch 1.Among the embodiment, the mean value and the maximum of ICBM SHF satellite terminal monitoring access service flow, the foundation of carrying out bandwidth resource allocation and adjustment by the network management control center according to the access service flow of ICBM SHF satellite terminal.
The congestion management at described network management control center comprises step:
9. the bandwidth resources of distributing, adjusting the satellite communication system network are concentrated at network management control center 3.Its bandwidth resources of the present invention are distributed by VP/VC and are adjusted, and VP is a virtual path in the formula, and VC is a virtual channel.Embodiment the 9. in the step network management control center carry out bandwidth resource allocation and adjustment by VP/VC, the preassignment of the whole network bandwidth resources should be followed following principle: a) configurable many VP connect between two earth stations, and can further carry out the configuration of the VC connection VP under; B) bandwidth manages according to multilevel precedence and distributes; C) all VP of earth station up link connect bandwidth (peak value) sum and can surpass up-link carrier speed, but the VP of arbitrary priority connection bandwidth (peak value) sum must be less than up-link carrier speed; D) if all VP of the down link of each wave beam connect bandwidth (peak value) sum less than descending carrier speed, then the corresponding output end mouth of spaceborne atm switching element will can not take place congested and cause loss of data, but this moment, the system bandwidth utilance was lower.During the system actual motion, can make all VP of down link connect bandwidth (peak value) sums, to improve the system bandwidth utilance greater than descending carrier speed.Therefore, when the planning of the whole network bandwidth resources is carried out at the network management control center, between system service quality (QoS), bandwidth availability ratio, exist compromisely, and depend primarily on choosing of following parameters: a) bandwidth that connects of all VP of each earth station up link and; B) bandwidth that connects of each priority VP of each earth station up link and; C) bandwidth that connects of all VP of the down link of each wave beam and.The one side of choosing of these parameters is undertaken tentatively definite by user's request, can monitor the whole network running status by the center on the other hand, according to the traffic statistics situation of each earth station business, adjust the relevant allocation of parameters of the whole network bandwidth resources, make system be in optimal operational condition.
10. in real time the bandwidth resources of monitor satellite communication system network are used, and when according to the priority that connects, the bandwidth of distribution, removing selectively and causing congested connection when congested appears in the satellite communication system network, remove congestion state.The 10. the network described in the step occur congestedly, its criterion is that cell-queue's length in any output port buffer memory of spaceborne ATM switch is greater than 1000 cells.When embodiment is 1001 cells when cell-queue's length of network management control center monitors in a certain output port buffer memory, the service chaining of lowest priority is removed, thereby removed congestion state.
Finish the design of wideband satellite communication system congestion management.
Claims (6)
1, a kind of congestion management that is applicable to wideband satellite communication system, it be is characterized in that by the system congestion administrative skill that the congestion management feature of spaceborne ATM switch, ICBM SHF satellite terminal, network management control center three parts is formed:
The congestion management of described spaceborne ATM switch comprises step:
1. monitor the cell-queue's length in each output port buffer memory of spaceborne ATM switch in real time;
2. broadcast in real time the cell-queue's length in each output port buffer memory of spaceborne ATM switch earthward;
3. take place when congested when spaceborne ATM switch, according to cell priority and abandon sign and carry out the cell discard processing, obtain the service quality of high-priority service;
4. according to the wideband satellite communication system seating surface to node or towards the occupation mode of broadband user's transfer of data, the multi-access mode of uplink downlink and memory capacity, the processing speed of spaceborne ATM switch, spaceborne ATM switch can be carried out the dynamic assignment of I/O bandwidth resources by user's service bandwidth demand;
The congestion management of described ICBM SHF satellite terminal comprises step:
5. ICBM SHF satellite terminal is carried out the flow control of access service according to the bandwidth of being distributed;
6. take place will the cell of CLP=1 to be abandoned when congested when ICBM SHF satellite terminal, simultaneously congestion information is sent to the network management control center and carry out congested processing, CLP is a Cell Loss Priority in the formula;
7. ICBM SHF satellite terminal receives the cell-queue's length in the output buffers of spaceborne ATM switch broadcasting, this information is sent to the network management control center monitor processing;
8. ICBM SHF satellite terminal monitoring access service flow, the foundation that these service traffics are carried out bandwidth resource allocation and adjustment as network management control center, spaceborne ATM switch;
The congestion management at described network management control center comprises step:
9. the bandwidth resources of distributing, adjusting the satellite communication system network are concentrated at the network management control center;
10. in real time the bandwidth resources of monitor satellite communication system network are used, and when according to the priority that connects, the bandwidth of distribution, removing selectively and causing congested connection when congested appears in the satellite communication system network, remove congestion state;
Finish the congestion management of wideband satellite communication system.
2, a kind of congestion management that is applicable to wideband satellite communication system according to claim 1, it is characterized in that: the 1. cell-queue's length in each the output port buffer memory of spaceborne ATM switch described in the step, its buffer memory capacity is not less than 5000 cells, wherein the buffer memory capacity that independently takies of each output port is not less than 100 cells, and remaining buffer memory capacity can adopt each output port to share and take or independent occupancy mode.
3, a kind of congestion management that is applicable to wideband satellite communication system according to claim 1, it is characterized in that: 2. the broadcast cell-queue's length in each output port buffer memory of spaceborne ATM switch in real time described in the step earthward, and its broadcast rate should be not less than 9.6kbps.
4, a kind of congestion management that is applicable to wideband satellite communication system according to claim 1 is characterized in that: the 3. cell priority described in the step, its priority is no less than 8 grades.
5, a kind of congestion management that is applicable to wideband satellite communication system according to claim 1 is characterized in that: the 9. bandwidth resources described in the step, and its bandwidth resources are distributed by VP/VC and are adjusted, and VP is a virtual path in the formula, and VC is a virtual channel.
6, a kind of congestion management that is applicable to wideband satellite communication system according to claim 1, it is characterized in that: the 10. the satellite communication system network described in the step occur congestedly, its criterion is that cell-queue's length in any output port buffer memory of spaceborne ATM switch is greater than 1000 cells.
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| CN101699795B (en) * | 2009-10-29 | 2012-07-18 | 中兴通讯股份有限公司 | Message congestion processing method and system |
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